package com.kylin.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.kylin.eduservice.entity.EduSubject;
import com.kylin.eduservice.entity.excel.SubjectData;
import com.kylin.eduservice.service.EduSubjectService;
import com.kylin.handler.GuliException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;


@Component
public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    @Autowired
    EduSubjectService subjectService;


    //因为SubjectExcelListener不能交给spring进行管理，需要自己手动new，所以不能注入其他对象
    //不能实现数据库操作
    //public EduSubjectService subjectService;

/*    public SubjectExcelListener(){

    }

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }*/


    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData ==null) {
            throw new GuliException(2001,"文件数据为空");
        }

        //一行行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectData.getOneSubjectName());
        if (existOneSubject==null){
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }
        //判断一级分类是否重复
        String pid = existOneSubject.getId();

        EduSubject existTwoSubject = this.existTwoSubject(subjectData.getTwoSubjectName(), pid);
        if (existTwoSubject==null){
            existTwoSubject = new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }
    }

    //判断一级分类不能重复添加
    private EduSubject existOneSubject(String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }

    //判断二级分类不能重复添加
    private EduSubject existTwoSubject(String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }


    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
